package com.spark.demonetty.netty_demo.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

/**
 * @author fuqiang
 * @Description netty客户端
 * @Date 2020/10/21
 */
public class NettyClient {

    public void connect(int port, String host){
        // 配置客户端nio线程组
        EventLoopGroup group = new NioEventLoopGroup();

        try {

            Bootstrap b = new Bootstrap();
            b.group(group)
                    .channel(NioSocketChannel.class)
                    .option(ChannelOption.TCP_NODELAY,true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new LineBasedFrameDecoder(1024));
                            ch.pipeline().addLast(new StringDecoder());
                            ch.pipeline().addLast(new TimeClientHander());
                        }
                    });
            // 发起异步连接操作
            ChannelFuture f = b.connect(host,port).sync();

            // 等待客户端链路关闭
            f.channel().closeFuture().sync();

        }catch (Exception e){
            e.printStackTrace();
        }finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) {
        int port = 10010;
        if(args != null && args.length > 0){
            port = Integer.valueOf(args[0]);
        }
        new NettyClient().connect(port,"127.0.0.1");
    }
}
